BUG: unable to handle kernel paging request at fffffffffffffe90
PGD 9e6e067 P4D 9e6e067 PUD 9e70067 PMD 0 
Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 21005 Comm: syz-executor.0 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:mm_update_next_owner+0x444/0x650 kernel/exit.c:453
Code: 70 fa ff ff 49 39 c5 0f 84 df fe ff ff e8 34 c7 29 00 4c 8d 85 20 04 00 00 4c 89 c0 48 c1 e8 03 80 3c 18 00 0f 85 18 01 00 00 <4c> 8b bd 20 04 00 00 4d 39 e7 75 95 e9 12 fd ff ff e8 06 c7 29 00
RSP: 0018:ffff888231b3fd50 EFLAGS: 00010246
RAX: 1fffffffffffffd2 RBX: dffffc0000000000 RCX: ffffffff8138bd9e
RDX: 0000000000000000 RSI: ffffffff8138be3c RDI: ffff888000112a10
RBP: fffffffffffffa70 R08: fffffffffffffe90 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000000 R12: ffff8880b447e6c0
R13: ffff888094697310 R14: ffff8880324be4c0 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffffffffffe90 CR3: 0000000235214000 CR4: 00000000003406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 exit_mm kernel/exit.c:548 [inline]
 do_exit+0xae4/0x2be0 kernel/exit.c:857
 do_group_exit+0x125/0x310 kernel/exit.c:967
 __do_sys_exit_group kernel/exit.c:978 [inline]
 __se_sys_exit_group kernel/exit.c:976 [inline]
 __x64_sys_exit_group+0x3a/0x50 kernel/exit.c:976
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f34b18e4059
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffe53378e98 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 000000000000001e RCX: 00007f34b18e4059
RDX: 00007f34b1896c9b RSI: ffffffffffffffb8 RDI: 0000000000000000
RBP: 0000000000000000 R08: 00000000e0ae0a7a R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: 00007ffe53378f80
Modules linked in:
CR2: fffffffffffffe90
---[ end trace bcbb0fbfa96606e4 ]---
RIP: 0010:mm_update_next_owner+0x444/0x650 kernel/exit.c:453
Code: 70 fa ff ff 49 39 c5 0f 84 df fe ff ff e8 34 c7 29 00 4c 8d 85 20 04 00 00 4c 89 c0 48 c1 e8 03 80 3c 18 00 0f 85 18 01 00 00 <4c> 8b bd 20 04 00 00 4d 39 e7 75 95 e9 12 fd ff ff e8 06 c7 29 00
RSP: 0018:ffff888231b3fd50 EFLAGS: 00010246
RAX: 1fffffffffffffd2 RBX: dffffc0000000000 RCX: ffffffff8138bd9e
RDX: 0000000000000000 RSI: ffffffff8138be3c RDI: ffff888000112a10
RBP: fffffffffffffa70 R08: fffffffffffffe90 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000000 R12: ffff8880b447e6c0
R13: ffff888094697310 R14: ffff8880324be4c0 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffffffffffe90 CR3: 0000000235214000 CR4: 00000000003406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 4 bytes skipped:
   0:	49 39 c5             	cmp    %rax,%r13
   3:	0f 84 df fe ff ff    	je     0xfffffee8
   9:	e8 34 c7 29 00       	callq  0x29c742
   e:	4c 8d 85 20 04 00 00 	lea    0x420(%rbp),%r8
  15:	4c 89 c0             	mov    %r8,%rax
  18:	48 c1 e8 03          	shr    $0x3,%rax
  1c:	80 3c 18 00          	cmpb   $0x0,(%rax,%rbx,1)
  20:	0f 85 18 01 00 00    	jne    0x13e
* 26:	4c 8b bd 20 04 00 00 	mov    0x420(%rbp),%r15 <-- trapping instruction
  2d:	4d 39 e7             	cmp    %r12,%r15
  30:	75 95                	jne    0xffffffc7
  32:	e9 12 fd ff ff       	jmpq   0xfffffd49
  37:	e8 06 c7 29 00       	callq  0x29c742